The present invention relates to a medical sensor (1) for measuring pulse, blood, tissue and/or skin parameters by means of electromagnetic waves in the transmission or reflection method. The sensor (1) has a strip- and/or band-shaped carrier part (2) which carries at least one transmitter element and at least one receiver element. In order that the sensor (1) can be used on a patient more than once and is sufficiently secured against relative movements with respect to a body part, the carrier part (2), on an inner side (9) provided to make contact with the body part, has at least two adhesive bodies (25, 26) which are spaced apart from one another and during measurement adhere to the body part, while the rest of the inner side (9) is designed to be essentially non-adhesive with respect to the body part.